/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:20:04,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:20:04,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:20:04,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:20:04,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:20:04,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:20:04,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:20:04,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:20:04,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:20:04,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:20:04,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:20:04,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:20:04,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:20:04,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:20:04,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:20:04,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:20:04,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:20:04,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:20:04,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:20:04,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:20:04,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:20:04,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:20:04,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:20:04,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:20:04,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:20:04,650 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:20:04,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:20:04,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:20:04,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:20:04,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:20:04,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:20:04,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:20:04,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:20:04,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:20:04,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:20:04,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:20:04,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:20:04,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:20:04,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:20:04,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:20:04,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:20:04,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:20:04,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:20:04,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:20:04,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:20:04,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:20:04,740 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:20:04,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:20:04,741 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:20:04,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:20:04,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:20:04,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:20:04,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:20:04,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:20:04,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:20:04,743 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:20:04,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:20:04,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:20:04,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:20:04,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:20:04,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:20:04,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:20:04,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:20:04,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:20:04,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:20:04,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:20:04,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:20:04,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:20:04,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:20:04,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:20:04,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:20:04,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:20:05,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:20:05,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:20:05,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:20:05,222 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:20:05,223 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:20:05,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-11-06 22:20:05,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9f3a15f/f89f1b5fb53149b599b1091e72388926/FLAG52526718c [2020-11-06 22:20:05,976 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:20:05,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-11-06 22:20:05,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9f3a15f/f89f1b5fb53149b599b1091e72388926/FLAG52526718c [2020-11-06 22:20:06,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af9f3a15f/f89f1b5fb53149b599b1091e72388926 [2020-11-06 22:20:06,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:20:06,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:20:06,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:20:06,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:20:06,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:20:06,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178cf260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06, skipping insertion in model container [2020-11-06 22:20:06,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:20:06,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:20:06,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:20:06,566 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:20:06,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:20:06,602 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:20:06,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06 WrapperNode [2020-11-06 22:20:06,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:20:06,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:20:06,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:20:06,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:20:06,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... [2020-11-06 22:20:06,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:20:06,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:20:06,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:20:06,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:20:06,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:20:06,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:20:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:20:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:20:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-06 22:20:06,715 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:20:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:20:06,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:20:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:20:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:20:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:20:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-06 22:20:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:20:06,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:20:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:20:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:20:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:20:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:20:06,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:20:07,001 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:20:07,001 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:20:07,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:20:07 BoogieIcfgContainer [2020-11-06 22:20:07,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:20:07,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:20:07,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:20:07,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:20:07,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:20:06" (1/3) ... [2020-11-06 22:20:07,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445fb153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:20:07, skipping insertion in model container [2020-11-06 22:20:07,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:20:06" (2/3) ... [2020-11-06 22:20:07,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@445fb153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:20:07, skipping insertion in model container [2020-11-06 22:20:07,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:20:07" (3/3) ... [2020-11-06 22:20:07,037 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-11-06 22:20:07,075 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:20:07,078 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:20:07,093 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:20:07,124 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:20:07,125 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:20:07,125 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:20:07,125 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:20:07,125 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:20:07,125 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:20:07,125 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:20:07,126 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:20:07,143 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:20:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:20:07,148 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:07,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:07,149 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:07,155 INFO L82 PathProgramCache]: Analyzing trace with hash 560135365, now seen corresponding path program 1 times [2020-11-06 22:20:07,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:07,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299838557] [2020-11-06 22:20:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:20:07,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299838557] [2020-11-06 22:20:07,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:20:07,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:20:07,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68420125] [2020-11-06 22:20:07,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:20:07,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:20:07,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:20:07,717 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-11-06 22:20:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:07,972 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-11-06 22:20:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:20:07,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:20:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:07,986 INFO L225 Difference]: With dead ends: 38 [2020-11-06 22:20:07,986 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:20:07,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:20:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:20:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:20:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:20:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-06 22:20:08,042 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-06 22:20:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:08,043 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-06 22:20:08,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:20:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-06 22:20:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:20:08,045 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:08,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:08,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:20:08,046 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:08,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:08,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1295611761, now seen corresponding path program 1 times [2020-11-06 22:20:08,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:08,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966590151] [2020-11-06 22:20:08,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:20:08,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966590151] [2020-11-06 22:20:08,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23153633] [2020-11-06 22:20:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:20:08,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:20:08,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:08,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-11-06 22:20:08,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107561491] [2020-11-06 22:20:08,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:20:08,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:20:08,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:20:08,414 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-11-06 22:20:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:08,670 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-06 22:20:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:20:08,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-11-06 22:20:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:08,672 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:20:08,673 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:20:08,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:20:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:20:08,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-06 22:20:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:20:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-06 22:20:08,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-11-06 22:20:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:08,684 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-06 22:20:08,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:20:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-06 22:20:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:20:08,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:08,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:08,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:20:08,900 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash -116387003, now seen corresponding path program 2 times [2020-11-06 22:20:08,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:08,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968088601] [2020-11-06 22:20:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:08,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:09,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:09,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:20:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968088601] [2020-11-06 22:20:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295964345] [2020-11-06 22:20:09,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:09,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:20:09,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:20:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:20:09,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:09,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-11-06 22:20:09,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483174811] [2020-11-06 22:20:09,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:20:09,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:09,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:20:09,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:20:09,255 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 15 states. [2020-11-06 22:20:09,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:09,673 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-06 22:20:09,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:20:09,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-11-06 22:20:09,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:09,675 INFO L225 Difference]: With dead ends: 31 [2020-11-06 22:20:09,675 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:20:09,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:20:09,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:20:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:20:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:20:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:20:09,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-11-06 22:20:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:09,685 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:20:09,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:20:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:20:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:20:09,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:09,687 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:09,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:09,901 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:09,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:09,903 INFO L82 PathProgramCache]: Analyzing trace with hash -738125937, now seen corresponding path program 3 times [2020-11-06 22:20:09,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:09,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849299575] [2020-11-06 22:20:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:09,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:09,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:20:10,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849299575] [2020-11-06 22:20:10,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506131633] [2020-11-06 22:20:10,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:10,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:20:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:20:10,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:20:10,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:10,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-11-06 22:20:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514924309] [2020-11-06 22:20:10,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:20:10,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:20:10,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:20:10,316 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 18 states. [2020-11-06 22:20:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:10,893 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-06 22:20:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:20:10,894 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-11-06 22:20:10,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:10,900 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:20:10,901 INFO L226 Difference]: Without dead ends: 29 [2020-11-06 22:20:10,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-11-06 22:20:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-06 22:20:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-06 22:20:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-06 22:20:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-06 22:20:10,912 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-11-06 22:20:10,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:10,914 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-06 22:20:10,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:20:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-06 22:20:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:20:10,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:10,916 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:11,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:11,132 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1342585285, now seen corresponding path program 4 times [2020-11-06 22:20:11,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:11,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930384157] [2020-11-06 22:20:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:20:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:20:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:20:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:20:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:20:11,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930384157] [2020-11-06 22:20:11,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981592768] [2020-11-06 22:20:11,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:11,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:20:11,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:20:11,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:20:11,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:20:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:20:11,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:20:11,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-11-06 22:20:11,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502846198] [2020-11-06 22:20:11,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:20:11,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:20:11,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:20:11,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:20:11,491 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2020-11-06 22:20:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:20:11,870 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-06 22:20:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:20:11,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-11-06 22:20:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:20:11,872 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:20:11,872 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:20:11,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:20:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:20:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:20:11,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:20:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-06 22:20:11,881 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-11-06 22:20:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:20:11,882 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-06 22:20:11,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:20:11,882 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-06 22:20:11,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:20:11,883 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:20:11,883 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:20:12,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:20:12,097 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:20:12,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:20:12,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1660180111, now seen corresponding path program 5 times [2020-11-06 22:20:12,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:20:12,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691644392] [2020-11-06 22:20:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:20:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:20:12,114 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:20:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:20:12,128 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:20:12,157 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:20:12,157 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:20:12,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:20:12,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:20:12 BoogieIcfgContainer [2020-11-06 22:20:12,203 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:20:12,206 INFO L168 Benchmark]: Toolchain (without parser) took 5871.61 ms. Allocated memory was 153.1 MB in the beginning and 185.6 MB in the end (delta: 32.5 MB). Free memory was 128.3 MB in the beginning and 127.9 MB in the end (delta: 402.2 kB). Peak memory consumption was 33.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:12,206 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:20:12,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.72 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 118.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:12,208 INFO L168 Benchmark]: Boogie Preprocessor took 37.34 ms. Allocated memory is still 153.1 MB. Free memory was 118.7 MB in the beginning and 117.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:12,209 INFO L168 Benchmark]: RCFGBuilder took 365.36 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 105.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:12,213 INFO L168 Benchmark]: TraceAbstraction took 5188.79 ms. Allocated memory was 153.1 MB in the beginning and 185.6 MB in the end (delta: 32.5 MB). Free memory was 105.0 MB in the beginning and 127.9 MB in the end (delta: -22.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:20:12,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 260.72 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 118.7 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.34 ms. Allocated memory is still 153.1 MB. Free memory was 118.7 MB in the beginning and 117.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 365.36 ms. Allocated memory is still 153.1 MB. Free memory was 117.3 MB in the beginning and 105.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5188.79 ms. Allocated memory was 153.1 MB in the beginning and 185.6 MB in the end (delta: 32.5 MB). Free memory was 105.0 MB in the beginning and 127.9 MB in the end (delta: -22.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 5; VAL [input=5] [L13] CALL, EXPR id(input) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) VAL [id(input)=5, input=5] [L13] int result = id(input); [L14] COND TRUE result == 5 VAL [input=5, result=5] [L15] CALL reach_error() [L4] __assert_fail("0", "id_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.0s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 116 SDslu, 178 SDs, 0 SdLazy, 395 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 221 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 300 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 246 ConstructedInterpolants, 0 QuantifiedInterpolants, 18960 SizeOfPredicates, 11 NumberOfNonLiveVariables, 483 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 100/200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...